1.	Simplify 1 Simplify the following expression: $$ {\left(2 - -3\right)}^{2} - \left(4 - 2\right)\left(5 + 1\right) $$ Correct Answer $$ 13$$ or 13.0000

2.	Simplify 2 Simplify the following expression: $$ 2\frac{-4}{2} - \frac{3}{5}\left(-2 + 3\right) $$ Correct Answer $$ \frac{-23}{5}$$ or -4.60000

3.	Fractions 1 Simplify the following expression: $$ \frac{4}{3} + \frac{-5}{4} $$ Correct Answer $$ \frac{1}{12}$$ or 0.08333333333333326

4.	Fractions 2 Simplify the following expression: $$ \frac{\frac{-4}{6}}{\frac{5}{2}} $$ Correct Answer $$ \frac{-4}{15}$$ or -0.26666666666666666

5.	Significant figures 1. Write the following to 5 significant figures: 0.063848719 Correct Answer 0.063849 or $$6.3849\times10^{-2}$$ 2. Write the following to 2 significant figures: 22.726323 Correct Answer 23 or $$2.3\times10^{1}$$

6.	Standard Form 1. Write the following in standard form to 3 significant digits: 1919.36 Correct Answer $$1.92\times10^{3}$$ 2. Write the following in standard form to 3 significant digits: 45.0793 Correct Answer $$4.51\times10^{1}$$

7.	Significant figures 1. Write the following in preferred standard form to 4 significant digits: 9290.8 Correct Answer $$9.291\times10^{3}$$ 2. Write the following in preferred standard form to 4 significant digits: 0.000000072807 Correct Answer $$72.81\times10^{-9}$$

8.	Simplify 2 Simplify the following expression: $$ \left(-1 - -2\right)\frac{3}{1} - 2(-5)(-3) $$ Correct Answer $$ -27$$ or -27.0000

9.	Simplify 1 Simplify the following expression: $$ 2\times4\times6\left(-4 + 3 - \left(4 + 2\right)\right) $$ Correct Answer $$ -336$$ or -336.000

10.	Simplify 2 Simplify the following expression: $$ \frac{3 - 4}{-4 - -5} - {\left(2 + -5\right)}^{2} $$ Correct Answer $$ -10$$ or -10.0000